/* DNS Fingerprint by Nexus <nexus@patrol.i-way.co.uk> */

/* Defines */

#define	VERSION	"1.0"
#define	BUFFER_SIZE	256

#ifndef	_WIN32

#define INVALID_SOCKET  (int)(~0)
#define SOCKET_ERROR         (-1)

#endif

/* Structures */

/* DNS Header Record, Little Endian - sorry you Big boys ;-) */

typedef struct {
	unsigned 		id:16;
	unsigned		rd :1;
	unsigned		tc :1;
	unsigned		aa :1;
	unsigned		opcode :4;
	unsigned		qr :1;
	unsigned		rcode :4;
	unsigned		mbz:3;
	unsigned		ra :1;
	unsigned		qdcount:16;
	unsigned		ancount:16;
	unsigned		nscount:16;
	unsigned		arcount:16;
} DNS_HEADER;

/* Constants */

/* Hard-coded requests as I'm a lazy bastard - and the Header ID is a giveaway ;-) */

char version[]=				"\x4A\x4A\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00"
							"\x07\x76\x65\x72\x73\x69\x6F\x6E\x04\x62\x69\x6E"
							"\x64\x00\x00\x10\x00\x03";

char authors[]=				"\x4A\x4A\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00"
							"\x07\x61\x75\x74\x68\x6F\x72\x73\x04\x62\x69\x6E"
							"\x64\x00\x00\x10\x00\x03";
	
char loopback[]=			"\x4A\x4A\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00"
							"\x01\x31\x01\x30\x01\x30\x03\x31\x32\x37\x07\x69"
							"\x6E\x2D\x61\x64\x64\x72\x04\x61\x72\x70\x61\x00"
							"\x00\x0C\x00\x01";

char localhost[] =			"\x4A\x4A\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00"
							"\x09\x6C\x6F\x63\x61\x6C\x68\x6F\x73\x74\x00\x00"
							"\x01\x00\x01";

const char *rcode_values[9] =
				{
					"No Error",
					"Packet Format Error",
					"Internal Server Error",
					"Name Error",
					"Request Not Implemented",
					"Request Refused",
					"Active Error",
					"Conflict Error",
					"Unknown"
				};